12819809 has 8 divisors (see below), whose sum is σ = 13416000. Its totient is φ = 12226896.

The previous prime is 12819773. The next prime is 12819841. The reversal of 12819809 is 90891821.

12819809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12819809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12819869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10919 + ... + 12035.

It is an arithmetic number, because the mean of its divisors is an integer number (1677000).

Almost surely, 2^12819809 is an apocalyptic number.

It is an amenable number.

12819809 is a deficient number, since it is larger than the sum of its proper divisors (596191).

12819809 is a wasteful number, since it uses less digits than its factorization.

12819809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639.

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 12819809 is about 3580.4760856624. The cubic root of 12819809 is about 234.0420274185.

The spelling of 12819809 in words is "twelve million, eight hundred nineteen thousand, eight hundred nine".